I am using a very hard time acquiring ammo for it locally, and it has been way way too very long since I purchased ammo to be sure I am obtaining the suitable item. Any help greatly appreciated. Posted On: 2/three/2013 By: Boomer A: Probably your MKII is chambered https://rkmunitions.com/product/22-hornet-45-gr-sp-sellier-bellot-20-rounds/